The story

Iranian presidential challenger Mir Hossein Moussavi's hometown of Tabriz is Exhibit A for his supporters as they argue that last week's election was rigged.

Official results from Friday's polls show that the city and its surrounding province of East Azerbaijan -- dominated by ethnic Azeris like Moussavi -- voted 57 percent to 42 percent to re-elect hard-line incumbent President Mahmoud Ahmadinejad. It's a result many observers of Iranian politics find incongruous, but just one of the things that have raised eyebrows among Western analysts.

An Iranian official who asked to remain unidentified said Monday that Moussavi was not popular in Tabriz. There were no exit polls conducted in Friday's balloting and little polling before the election. Nate Silver, who runs the U.S. election Web site FiveThirtyEight, told CNN the official results were "ambiguous." Read full article »